The data on global irradiation incident on a horizontal surface in Port Harcourt during the 13-
year period 1977–1989 are analyzed and shown to vary with the climatic changes of the …

Correlations are developed for calculating the regression coefficients a and b of the
equation H/H 0= a+ b (S/S 0) for monthly mean daily global radiation on a horizontal surface …

Hourly global solar radiation data measured on a horizontal surface in Amman, Jordan,
available for the period 1983–1987, have been studied and analysed. Average values of …

An empirical correlation for estimating monthly mean daily total solar radiation on a
horizontal surface is suggested from latitude, altitude, sunshine duration, monthly mean …

Variations in the average monthly, seasonal and daily patterns of total radiation, relative
humidity, temperature and sunshine duration in Ibadan have been presented. Various …

A statistical procedure has been employed to develop correlations of monthly-mean-hourly
global and diffuse solar radiation on a horizontal surface to hourly sunshine duration …

Monthly mean distribution of total irradiation over Nigeria is presented in the form of detailed
maps. Data were obtained from 32 stations spread within the country. Graphical …

The monthly average daily totals of global solar radiation on a horizontal surface at Madras
(13° 0′ N, 80° 11′ E) and Kodaikanal (10° 14′ N, 77° 28′ E) during the period 1983 …

In this paper a study has been made to estimate average monthly global radiation using
hours of bright sunshine, as measured solar radiation data are available only for five …

An attempt has been made to correlate the total solar radiation with cloud cover and relative
sunshine duration for three Nigerian stations—Gusau, Potiskum and Yola. For Potiskum, an …